From: from_faa on
ISE10.1 ISE11.х
"libfontconfig" mast be compile with "libexpat" (as in RH, Centos and so on), but not with "libxml2".
take|compile libfontconfig with libexpat (take from CentOS) and copy in ~/lib.
In ISE/settings64.sh(settings32.sh) rewrite
LD_LIBRARY_PATH=${XILINX}/lib/${PLATFORM}:${LD_LIBRARY_PATH}
with
LD_LIBRARY_PATH=<your place with new "libexpat">:${XILINX}/lib/${PLATFORM}:${LD_LIBRARY_PATH}

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frmsrcurl: http://compgroups.net/comp.arch.fpga/Xilinx-XPS-crash-on-Linux